如果你做不到，那就去教别人。
If you cannot do it, then teach.
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'
The exploration of computational complexity is a journey into the unknown, where each discovery opens new doors.
不论你怎么看待历史，历史都会在你身上留下痕迹。
We can easily forgive a child who is afraid of the dark；the real tragedy of life is when men are afraid of the light.